CN111248961B - Manual rotation and electric bending switching device and electric anastomat thereof - Google Patents

Abstract

The invention provides a manual rotation and electric bending switching device, which is used for an electric anastomat and comprises a manual rotation system and an electric bending system, wherein the manual rotation and electric bending switching device comprises a bracket, the bracket is provided with a manual rotation gear and an electric bending gear, the manual rotation system comprises a rotating head and a rotating ring, the rotating head is mutually matched and connected with the rotating ring, the electric bending system comprises a motor gear and a gear shaft, the motor gear is matched and connected with the gear shaft, and the rotating head is in contact and matched with the motor gear; the rotary head moves between the manual rotation position and the electric turning position of the bracket. When the manual rotation and electric bending functions of the instrument are operated by mistake in incorrect gears, the front end of the instrument does not perform operation, so that the safety and reliability of the functions of the instrument are ensured.

Description

Manual rotation and electric bending switching device and electric anastomat thereof

Technical Field

The invention relates to the field of medical instruments, in particular to an electric anastomat, and particularly relates to a manual rotation and electric bending switching device and the electric anastomat.

Background

The cutting anastomat comprises an operating handle, a shaft assembly and an end effector, wherein the end effector is used for cutting and suturing the tissue of the inner cavity of the human body under the control of the operating handle. The bending of the end effector of the existing electric endoscopic cutting anastomat and manual cutting anastomat is mostly realized by manually rotating a knob, in the operation process, a clinician needs to use one hand to operate the handle part of the cutting anastomat, and uses the other hand to control the bending of the end effector by rotating the knob.

The drawback of this technique is that one-handed operation cannot be achieved, and the effort required to operate by rotating the knob increases the fatigue strength of the clinician, while only a fixed angle of flexion can be achieved.

Present electronic instrument that turns that exists, its turn motor is located the rotating head, turn motor rotates along with the rotating head during manual rotation, there are circuit contact failure scheduling problem in the annular connection between motor and the circuit board, in order to guarantee the reliability of manual rotation function and electronic turn function simultaneously, the event remains to propose a manual rotation and electronic turn auto-change over device can make and be connected reliably between turn motor and the circuit board, guaranteed the rotating head when manual rotatory gear simultaneously, electronic turn function became invalid, when the rotating head was when electronic turn gear, manual rotation function became invalid. The reliability of the manual rotation and electric bending functions of the instrument is ensured.

Disclosure of Invention

The invention provides a manual rotation and electric turning switching device and an electric anastomat thereof, which at least solve the technical problem that in the prior art, rotation and turning are possible to occur simultaneously or electric turning/manual rotation is mistakenly touched during manual rotation/electric turning.

The invention provides a manual rotation and electric bending switching device, which is used for an electric anastomat and comprises a manual rotation system and an electric bending system, wherein the manual rotation and electric bending switching device comprises a bracket, the bracket is provided with a manual rotation gear and an electric bending gear, the manual rotation system comprises a rotating head and a rotating ring, the rotating head is mutually matched and connected with the rotating ring, the electric bending system comprises a motor gear and a gear shaft, the motor gear is matched and connected with the gear shaft, and the rotating head is in contact and matched with the motor gear; the rotary head moves between the manual rotation position and the electric turning position of the bracket.

Optionally, the rotating head drives the motor gear to move on the gear shaft, so that the motor gear is engaged with or disengaged from the gear shaft, and the movement of the rotating head between the manual rotation gear and the electric turning gear of the bracket causes the rotating head to be engaged with or disengaged from the rotating ring.

Optionally, when the rotating head is at the manual rotation position of the bracket, the motor gear is disengaged from the gear shaft, and the rotating head and the rotating ring are connected in a matching manner; when the rotating head is at the electric bending gear of the bracket, the motor gear is matched and connected with the gear shaft, and the rotating head is disengaged from the rotating ring.

Optionally, a rotating ring protrusion is arranged on the rotating ring, a rotating head protrusion is arranged on the rotating head, an internal tooth profile of the motor gear is arranged inside the motor gear, and a gear shaft protrusion is arranged on the gear shaft;

when the rotating head is at the manual rotating gear of the bracket, the rotating ring bulge and the rotating head bulge are in cross fit connection, and the internal tooth profile of the motor gear is separated from the gear shaft bulge.

Optionally, when the rotating head is at the electric turning gear of the bracket, the rotating ring protrusion is disengaged from the rotating head protrusion, and the internal tooth profile of the motor gear is engaged with the gear shaft protrusion.

Optionally, the manual rotation and electric turning switching device further includes a turning motor, the turning motor is fixedly connected to the gear shaft, and a rotational motion of the turning motor is transmitted to the motor gear through the gear shaft.

Optionally, the rotating head has a rotating head end face, the motor gear has a motor gear end face, and the rotating head end face is in contact fit with the motor gear end face.

Optionally, the rotating head is radially movable relative to the rotating ring.

Optionally, the electric turning system further includes an intermediate gear and a turning screw, the motor gear is in gear engagement with the intermediate gear, and the intermediate gear and the turning screw are welded together.

The electric anastomat comprises any one of the manual rotation and electric bending switching device.

The embodiment of the invention designs a manual rotation and electric turning switching device aiming at the problems of poor contact between a turning motor and a circuit board, reliability of manual rotation and electric turning functions and the like, and can realize the manual rotation and electric turning functions at the same time. The switching device can realize the switching between the manual rotation function and the electric bending function through the movement of the rotating head, and the safety and the reliability of the function of the instrument are ensured.

The technical scheme adopted by the invention is that the manual rotation and electric turning switching device is provided, so that the electric turning function is invalid when the rotating head is in a manual rotation gear, and the manual rotation function is invalid when the rotating head is in an electric turning gear, so that accidental damage caused by operating instruments in incorrect gears is prevented.

The most important point of the technical scheme of the invention is that a manual rotation and electric bending switching device of an electric endoscope cutting anastomat is designed, because the front and back movement of a rotating head in the switching device can only execute manual rotation action when a gear is manually rotated, and can only execute electric bending action when the gear is electrically bent, and when the manual rotation and electric bending functions of an instrument are operated by mistake in an incorrect gear, the front end of the instrument is not operated, so that the safety and the reliability of the functions of the instrument are ensured.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

FIG. 1 is a schematic diagram of an alternative electric stapler according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an alternative electric stapler including a manual rotation and electric bending switching device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an alternative electric stapler with a manual rotation and electric bending system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an alternative manual rotation and electric steering switching device in an electric steering gear according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an alternative rotary ring and rotary head in an electric bending gear according to an embodiment of the present invention;

FIG. 5-1 is an enlarged, fragmentary, schematic view of FIG. 5;

FIG. 6 is a schematic structural diagram of an alternative motor gear and gear shaft in an electric bending gear according to an embodiment of the present invention;

FIG. 6-1 is a schematic structural view of the right side view of FIG. 6;

FIG. 6-2 is an enlarged partial schematic view of the structure of FIG. 6-1;

FIG. 7 is a schematic view of the structure of the gun tube and the rotating ring in an alternative electric stapler according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an alternative manual rotation and electric steering switching device provided in an embodiment of the present invention when the manual rotation is shifted;

FIG. 9 is a schematic structural view of an alternative rotary ring and rotary head provided by an embodiment of the present invention when the gear is manually rotated;

FIG. 9-1 is a schematic structural view of the left side view of FIG. 9;

FIG. 9-2 is an enlarged, fragmentary, schematic view of FIG. 9-1;

FIG. 10 is a schematic structural diagram of an alternative motor gear and gear shaft in a manual gear position according to an embodiment of the present invention;

FIG. 11 is a schematic view of a rotary ring protrusion of an alternative electric stapler according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a rotary head protrusion in an alternative electric stapler according to an embodiment of the present invention;

FIG. 13 is a schematic view of an alternative electric stapler according to an embodiment of the present invention, wherein the middle gear and the bending screw are welded together;

fig. 14 is a schematic structural diagram of a mating relationship between a motor gear and a rotating head of an alternative electric stapler according to an embodiment of the present invention.

Reference numerals:

barrel 15-barrel U-shaped groove 2-rotating ring

21 swivel ring protrusion 22-swivel ring U-shaped protrusion 3-swivel head

31-rotating head projection 32-rotating head end face 4-bracket

5-turning nut 6-turning screw 61-turning screw end face

7-intermediate gear 71-intermediate gear end face 8-motor gear

81-internal tooth form 82 of motor gear-end surface 9 of motor gear-gear shaft

91-gear shaft bulge 10-bending motor 11-operating handle

12-elongated body 13-end effector

The following detailed description is intended to further illustrate but not limit the invention, the following example being only one preferred embodiment of the invention.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which like numerals in different drawings represent the same or similar elements, unless otherwise specified. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Detailed Description

The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Summary of The Invention

The technical problem to be solved by the technical scheme of the invention is that the rotation and the bending of the electric anastomat can happen simultaneously, but the actions of the rotation and the bending are not allowed to happen simultaneously in the actual operation, or the electric bending and/or the manual rotation is touched by mistake in the manual rotation and/or the electric bending.

In order to solve the technical problems, the technical scheme of the invention is characterized in that therotating head 3 is matched with therotating ring 2, the bendingmotor shaft 9 is matched with themotor gear 8, when the electric anastomat is in a rotating gear, theupper bulge 21 of therotating ring 2 is matched with theupper bulge 31 of therotating head 3, theinternal tooth form 81 of themotor gear 8 is separated from theupper bulge 91 of thegear shaft 9, and therefore the rotating motion of the bendingmotor 10 cannot be transmitted to themotor gear 8; when the electric anastomat is in a bending gear, themotor gear 8 is driven to move back and forth due to the movement of the position of therotating head 3, at the moment, theprotrusion 21 on therotating ring 2 is disengaged from theprotrusion 31 on therotating head 3, and theinternal tooth form 81 of themotor gear 8 is engaged with theprotrusion 91 on thegear shaft 9.

The key point is that the matching relation caused by the back-and-forth movement of themotor gear 8 is changed, namely, the rotation or the bending is caused by the movement of therotating head 3, and the rotation and the bending cannot run simultaneously. The effect of realization is that the rotating head is when manual rotatory gear, and electronic turning function is inefficacy, and when the rotating head was when electronic turning gear, manual rotatory function was inefficacy has prevented to produce unexpected damage at incorrect gear operation apparatus.

Exemplary devices

The following embodiments are shown in fig. 1 to 14, in which the manual rotation connection is shown in fig. 4 to 7.

The embodiment of the invention provides an electric anastomat comprising a manual rotation and electric turning switching device, and the electric anastomat comprises agun barrel 1, a gun barrelU-shaped groove 15, arotating ring 2, arotating ring bulge 21, a rotating ringU-shaped bulge 22, arotating head 3, arotating head bulge 31, a rotatinghead end face 32, a support 4, a turningnut 5, a turningscrew 6, a turningscrew end face 61, anintermediate gear 7, an intermediategear end face 71, amotor gear 8, a motor gearinternal tooth form 81, a motorgear end face 82, agear shaft 9, agear shaft bulge 91, a turningmotor 10, anoperating handle 11, anelongated body 12 and anend effector 13.

The manual rotation and electric turning switching device comprises a manual rotation system and an electric turning system, the manual rotation and electric turning switching device comprises a bracket 4, the bracket 4 is provided with a manual rotation gear and an electric turning gear, the manual rotation system comprises arotating head 3 and arotating ring 2, therotating head 3 and therotating ring 2 are mutually matched and connected, the electric turning system comprises amotor gear 8 and agear shaft 9, themotor gear 8 is matched and connected with thegear shaft 9, and therotating head 3 is in contact and matched with themotor gear 8; therotary head 3 is moved between the manual rotation position and the electric turning position of the holder 4.

Further, therotary head 3 drives themotor gear 8 to move on thegear shaft 9, so that themotor gear 8 is engaged with or disengaged from thegear shaft 9, and the movement of therotary head 3 between the manual rotation position and the electric turning position of the holder 4 causes therotary head 3 to be engaged with or disengaged from therotary ring 2.

Further, when therotary head 3 is at the manual rotation position of the bracket 4, themotor gear 8 is disengaged from thegear shaft 9, and therotary head 3 is engaged with therotary ring 2; when therotary head 3 is at the electric turning position of the holder 4, themotor gear 8 is engaged with thegear shaft 9, and therotary head 3 is disengaged from therotary ring 2.

Further, therotating ring 2 is provided with arotating ring protrusion 21, therotating head 3 is provided with arotating head protrusion 31, themotor gear 8 is provided with a motor gearinternal tooth form 81 inside, and thegear shaft 9 is provided with agear shaft protrusion 91; when therotary head 3 is at the manual rotation position of the holder 4, therotary ring protrusion 21 and therotary head protrusion 31 are cross-coupled to each other, and theinternal gear 81 of the motor gear is disengaged from thegear shaft protrusion 91.

Further, when therotary head 3 is at the electric turning position of the holder 4, therotary ring protrusion 21 is disengaged from therotary head protrusion 31, and the motor gearinternal tooth 81 is engaged with thegear shaft protrusion 91.

Further, the manual rotation and electric turning switching device further includes a turningmotor 10, the turningmotor 10 is fixedly connected to thegear shaft 9, and the rotational motion of the turningmotor 10 is transmitted to themotor gear 8 through thegear shaft 9.

Further, therotary head 3 has a rotaryhead end face 32, themotor gear 8 has a motorgear end face 82, and the rotaryhead end face 32 is in contact engagement with the motorgear end face 82.

Further, thespin head 3 is radially movable with respect to thespin ring 2.

Further, the electric turning system further comprises anintermediate gear 7 and a turningscrew 6, themotor gear 8 is in gear engagement with theintermediate gear 7, and theintermediate gear 7 and the turningscrew 6 are welded into a whole.

The electric anastomat comprises any one of the manual rotation and electric bending switching device.

In the electric bending connection, as shown in fig. 9 to 10, themotor gear 8 and theintermediate gear 7 are in gear engagement, the bendingscrew 6 and the bendingnut 5 are in screw engagement, and theintermediate gear 7 and the bendingscrew 6 are integrally welded by a welding process, as shown in fig. 13.

The manual rotation and electric bending switching device of the electric stapler comprises a manual rotation system and an electric bending system, as shown in fig. 3. The manual rotation function of the electric stapler is realized by therotary head 3, therotary ring 2 and thegun barrel 1, wherein the engagement of theswivel ring 2 with thebarrel 1 is connected to the barrelU-shaped groove 15 by the swivel ringU-shaped protrusion 22, as shown in fig. 7, when therotating ring 2 rotates, thebarrel 1 is driven to rotate, therotating head 3 and the bracket 4 are divided into a manual rotating gear and an electric bending gear according to the positions before and after matching, as shown in fig. 8, when thespin head 3 is in the manual rotation position, as shown in fig. 12, thespin head 3 is engaged with thespin ring protrusions 21 of thespin ring 2 via thespin head protrusions 31, as shown in fig. 11, when thespin head 3 is rotated, therotating ring 2 can be driven to rotate, so that thegun barrel 1 is driven to realize the 360-degree rotating function of the front end of the instrument.

As shown in fig. 8, the electric bending function of the electric stapler is realized by the bendingmotor 10, themotor gear 8, thegear shaft 9, theintermediate gear 7, the bendingnut 5, and the bendingscrew 6. Wherein themotor gear 8 is engaged with thegear shaft protrusion 91 of thegear shaft 9 through theinternal tooth form 81 as shown in fig. 6 and 10, and wherein theintermediate gear 7 and the bendingscrew 6 are welded to weld the intermediategear end face 71 and the bending screw end face 61 together as shown in fig. 13. When therotating head 3 is at the electric turning gear, the turningmotor 10 transmits the rotation motion to theintermediate gear 7 through thegear shaft 9 and themotor gear 8, theintermediate gear 7 drives the turningscrew 6 and the turningnut 8 to convert the rotation motion output by the turningmotor 10 into the back-and-forth motion of the turningnut 5, thereby pushing the turning connecting rod at the front end of the instrument to realize the left-and-right turning of the jaw of the instrument, wherein the key of the manual rotation and electric turning switching device is that therotating head 3 is matched with therotating ring 2, and themotor gear 8 is matched with thegear shaft 9. When therotary head 3 moves back and forth between the manual rotation position and the electric turning position of the stand 4, themotor gear 8 is driven to move back and forth on thegear shaft 9, when therotary head 3 moves back and forth on the manual rotation position of the stand 4, therotary ring protrusion 21 is engaged with therotary head protrusion 31, theinternal tooth profile 81 of the motor gear is disengaged from thegear shaft protrusion 91, the rotation movement of the turningmotor 10 cannot be transmitted to themotor gear 8, and at this time, the electric turning switch is touched by mistake, and the tool jaw does not perform the turning operation.

When therotary head 3 is at the electric turning gear position of the bracket 4, themotor gear 8 is driven to move back and forth by the movement of the position of therotary head 3, at this time, therotary ring protrusion 21 is disengaged from therotary head protrusion 31, theinternal tooth form 81 of the motor gear is engaged with thegear shaft protrusion 91, so that the turningmotor 10 can realize the left and right turning of the jaw of the instrument by the transmission of themotor gear 8, and at this time, if the manual turning function is operated by mistake, the front end of the instrument does not perform the turning action.

On the basis of the scheme, part of the scheme can realize the matching and disengaging functions with the motor gear by reducing the gear shaft and the part and adding features on the bending motor.

As shown in fig. 14, both side end surfaces of the gear and both side end surfaces of the rotary head fitting groove are fitted to each other, so that the forward and backward movement of the rotary head urges the gear to move forward and backward. Therotary head 3 has the rotaryhead end face 32, themotor gear 8 has the motorgear end face 82, and the rotaryhead end face 32 is in contact with and engaged with the motorgear end face 82, so that when therotary head 3 moves forward and backward, the rotaryhead end face 32 provides a radial force to the motorgear end face 82, thereby driving themotor gear 8 to move forward and backward relative to thegear shaft 9, and engaging and disengaging themotor gear 8 with and from thegear shaft 9.

Exemplary method

The specific working principle is as follows:

the manual rotation function of apparatus is realized through rotating head, rotatory ring and barrel, and wherein rotatory ring passes through the protruding U-shaped groove with the barrel and links together, and the rotating head is according to the cooperation around the position difference divide into manual rotation gear and electronic gear that turns round with the support, when the rotating head when manual rotation gear, the rotating head through with rotatory ring cooperation drive the barrel realize the 360 spin function of apparatus front end.

The electric bending function of the instrument is realized by a bending motor, a motor gear, a gear shaft, an intermediate gear, a bending nut and a bending screw. When the rotating head is at the electronic turn gear, the turn motor passes through motor gear, gear shaft and transmits rotary motion to the intermediate gear on, the intermediate gear drives turn screw rod, turn nut, converts the rotary motion of turn motor output into the fore-and-aft movement of turn nut to promote the turn connecting rod of apparatus front end and realize the left and right turn of apparatus keeping silent.

The key of the manual rotation and electric turning switching device is that the rotating head is matched with the rotating ring, and the motor gear is matched with the gear shaft. When the rotating head moves back and forth between a manual rotation gear and an electric turning gear of the bracket, the motor gear is driven to move back and forth on the gear shaft, when the rotating head moves back and forth on the manual rotation gear of the bracket, the bulge on the rotating ring is matched with the bulge on the rotating head, the internal tooth profile of the motor gear is separated from the bulge on the gear shaft, so that the rotating motion of the turning motor cannot be transmitted to the motor gear, the electric turning switch is touched by mistake, and the turning action cannot be executed by the jaw of the instrument; when the electronic turn gear of rotating head on the support, because the removal of rotating head position drives motor gear seesaw, rotatory protruding and the rotatory overhead arch of taking place of circle breaks away from the cooperation this moment, the manual rotatory function of maloperation, the instrument front end is not executed rotatory action, the inside profile of tooth of motor gear and the protruding cooperation on the gear shaft to the turn motor can realize the instrument and keep silent the turn about through the transmission of motor gear.

Due to the fact that the rotating head moves back and forth, the switching device can only execute manual rotation when gears are rotated manually, and can only execute electric bending when gears are bent electrically, and safety and reliability of functions of the instrument are guaranteed.

The most important point of the invention is to design a manual rotation and electric bending switching device of an electric endoscope cutting anastomat, because the front and back movement of a rotating head in the switching device can only execute manual rotation action when a gear is manually rotated, and can only execute electric bending action when the gear is electrically bent, and when the manual rotation and electric bending functions of an instrument are operated by mistake in incorrect gears, the front end of the instrument is not operated, thereby ensuring the safety and reliability of the functions of the instrument.

It should be noted that although in the above detailed description several units/modules or sub-units/modules of the apparatus are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.

Moreover, while the operations of the method of the invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

While the spirit and principles of the invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in such aspects may not be combined to benefit. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (8)

1. The manual rotation and electric bending switching device is used for an electric anastomat and comprises a manual rotation system and an electric bending system, and is characterized in that the manual rotation and electric bending switching device comprises a support (4), the support (4) is provided with a manual rotation gear and an electric bending gear, the manual rotation system comprises a rotating head (3) and a rotating ring (2), the rotating head (3) and the rotating ring (2) are mutually matched and connected, the electric bending system comprises a motor gear (8) and a gear shaft (9), the motor gear (8) is matched and connected with the gear shaft (9), and the rotating head (3) is in contact fit with the motor gear (8);

the rotary head (3) moves between the manual rotation gear and the electric bending gear of the bracket (4);

the rotating head (3) drives the motor gear (8) to move on the gear shaft (9), so that the motor gear (8) is matched with or separated from the gear shaft (9), and the rotating head (3) moves between the manual rotating gear and the electric bending gear of the bracket (4), so that the rotating head (3) is matched with or separated from the rotating ring (2);

when the rotating head (3) is at the manual rotating gear of the bracket (4), the motor gear (8) is disengaged from the gear shaft (9), and the rotating head (3) and the rotating ring (2) are mutually connected in a matching way;

when the rotating head (3) is at the electric bending gear of the bracket (4), the motor gear (8) is matched and connected with the gear shaft (9), and the rotating head (3) is separated from the rotating ring (2).

2. The manual rotation and electric turning switching device according to claim 1, wherein a rotating ring protrusion (21) is provided on the rotating ring (2), a rotating head protrusion (31) is provided on the rotating head (3), a motor gear internal tooth profile (81) is provided inside the motor gear (8), and a gear shaft protrusion (91) is provided on the gear shaft (9);

when the rotating head (3) is at the manual rotating gear of the bracket (4), the rotating ring bulge (21) and the rotating head bulge (31) are in cross fit connection, and the internal tooth profile (81) of the motor gear is separated from the gear shaft bulge (91).

3. The manual rotation and electrical steering switching apparatus according to claim 2, wherein when the rotating head (3) is at the electrical steering position of the bracket (4), the rotating ring protrusion (21) is disengaged from the rotating head protrusion (31), and the motor gear internal tooth profile (81) is engaged with the gear shaft protrusion (91).

4. The manual and electric steering switching device according to claim 1, further comprising a steering motor (10), wherein the steering motor (10) is fixedly connected with the gear shaft (9), and the rotation motion of the steering motor (10) is transmitted to the motor gear (8) through the gear shaft (9).

5. The manual rotation and electric cornering device according to claim 1, characterized in that said rotating head (3) has a rotating head end face (32), said motor gear (8) has a motor gear end face (82), said rotating head end face (32) being in contact engagement with said motor gear end face (82).

6. Manual rotation and electric cornering device according to claim 1, characterized in that said rotating head (3) is radially mobile with respect to said rotating ring (2).

7. The manual rotation and electric steering switching device according to claim 1, wherein the electric steering system further comprises an intermediate gear (7) and a steering screw (6), the motor gear (8) is in gear engagement with the intermediate gear (7), and the intermediate gear (7) is welded with the steering screw (6).

8. Electric stapler, characterized in that it comprises a manual rotation and electric bending switching device according to any one of claims 1 to 7.

Images